the setting site decision is another factor, especially in relation to the sea bed topography [3,16] for estimating the migration route of fish schools towards the coastal waters. Following the installation of the second set-net unit in 2006, the annual total catch increased, while the catch did not achieve double the amount of the single unit (Fig. 2). This result suggests that these two neighboring units share the same stock migrating to the Mae Rumpheung water due to the close proximity of the two units. The appropriate setting distance of neighboring units should be considered in any future expansion phase of the set-net technology transfer program.